Orthogonal multi-sine excitation signal design method for wind tunnel flight experiment

The invention relates to the field of wind tunnel experiments and aircraft excitation design, and provides an orthogonal multi-sine excitation signal design method for a wind tunnel flight experiment, which comprises the following steps of: firstly, obtaining the total number of harmonic components by setting an excitation period, a frequency range covered by excitation and the number of control surfaces; then, according to the total number of the harmonic components, the equivalent number of the harmonic components is distributed to each control surface, and the amplitude of the harmonic components in each control surface is set; secondly, optimizing the phase of the harmonic component in each control surface by using a PSO (Particle Swarm Optimization) algorithm; and finally, obtaining an orthogonal multi-sine excitation signal in each control surface. According to the method, the design process is simple and efficient, the phase is optimized by adopting the PSO algorithm, so that the frequency components i